[PATCH 25/41] x86/alternatives: Assert input parameters in text_poke_int3_batch()
From: Ingo Molnar
Date: Thu Mar 27 2025 - 16:59:08 EST
At this point the 'tp' input parameter must always be the
global 'tp_vec' array, and 'nr_entries' must always be equal
to 'tp_vec_nr'.
Assert these conditions - which will allow the removal of
a layer of indirection between these values.
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/alternative.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 4f23f6b4d51d..393d796e797d 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -2627,6 +2627,9 @@ static void text_poke_int3_batch(struct text_poke_int3_loc *tp, unsigned int nr_
lockdep_assert_held(&text_mutex);
+ WARN_ON_ONCE(tp != tp_vec);
+ WARN_ON_ONCE(nr_entries != tp_vec_nr);
+
int3_vec.vec = tp;
int3_vec.nr_entries = nr_entries;
--
2.45.2